After studying the brains of violent killers, rapists and robbers, German neurologist Gerhard Roth claims to have found a “dark patch” in the center of the brain -- he calls it the evil spot, a genetic source of violent behavior.
Roth, a professor at the University of Bremen, told Germany news site Bild.de that he had shown short films to criminals and measured their brain activity. A small section at the front of their brains showed no reaction to violent scenes; it remained "dark" when s
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